CN202285219U - Soundless electricity-saving type alternating-current contactor - Google Patents
Soundless electricity-saving type alternating-current contactor Download PDFInfo
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- CN202285219U CN202285219U CN201120352258XU CN201120352258U CN202285219U CN 202285219 U CN202285219 U CN 202285219U CN 201120352258X U CN201120352258X U CN 201120352258XU CN 201120352258 U CN201120352258 U CN 201120352258U CN 202285219 U CN202285219 U CN 202285219U
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Abstract
The utility model relates to a soundless electricity-saving type alternating-current contactor comprising resistors R2 and R3, a resistance strain piece R7, a resistor R4 and a capacitor C1, which are sequentially connected between the positive pole and the negative pole of a rectification circuit in series; the anode of a D2 is connected with the joint of the R2 and the R3, and the cathode of the D2 is connected with the negative pole of the rectification circuit; the anode of one-way silicon controlled rectifier (SCR) is connected with the positive pole of the rectification circuit, the cathode of the SCR is connected with one end of an attracting coil L1 in the alternating-current contactor, and the other end of the L1 is connected with the negative pole of the rectification circuit; and the joint of the R3 and the R7 is connected with the first base electrode of a double-base diode BT by an R5, the second base electrode of the BT is connected with the control electrode of the SCR, and the emitter electrode of the BT is connected with the joint of the R4 and the C1. According to the soundless electricity-saving type alternating-current contactor, the power supply of the L1 is controlled by utilizing the mutation of the resistance value of the R7, so that the L1 has large current at the initial state of electrifying, and the attraction of an armature of the contactor is realized. Meanwhile, the resistance value of the R7 is quickly increased, and the current of the L1 is lowered and is also stabilized at an attracting state.
Description
Technical field
The utility model relates to a kind of silent power-saving formula A.C. contactor.
Background technology
A.C. contactor is to be widely used as cut-offfing and control circuit of electric power.It can control startup and the running, reverse and stop of motor at a distance continually automatically as executive component.Capacitance grade according to product; Can connect the overload that surpasses the several times rated current with disjunction in short-term; Per hour can hot line job 1200 times, have advantages such as safe in utilization, that price is lower, in industrial and mining enterprises, communications and transportation and automatic control system, use very extensive; But also there are shortcomings such as noise is big, the life-span is short.
Existing alternating current magnetic-type contactor is graded by sucking coil, iron core, armature, contact system, arc quenching system, the body or support sector and forms.Behind coil electricity, produce magnetic field, magnetic flux forms the closed-loop path through iron core, armature and working gas gap, produces electromagnetic force, and armature is inhaled to iron core.Meanwhile, armature also receives the pulling force of reaction spring, has only when electromagnetic attraction during greater than the spring counter-force, and armature could be held by iron core reliably; Directly or through lever principle make moving contact contact with fixed contact this moment, for connecting circuit condition is provided.Lean on the counter-force of spring that moving contact is set back behind the coil losing electricity, moving contact and fixed contact are separated, thereby divide deenergizing.
For the A.C. contactor of extensive use in the industry, exist the problem of consumed power, generation noise.A.C. contactor produces the reason of noise in exchanging control: A.C. contactor is when exchanging the control operation, because alternating electromagnet suction is to be to change between zero in maximum and minimum value, when magnetic flux during through null value, iron core also is zero to the suction of armature; Therefore in each cycle, a certain section time suction must be arranged less than the spring counter-force, at this moment armature begins to discharge under the counter-force effect, and when suction during greater than counter-force, armature is again by adhesive, and so repeatedly, armature produces to vibrate and also sends noise.
The energy loss of A.C. contactor ac operation: by some adverse consequencess of vibration generation; Armature can not tightly be sucked by iron core, can on iron core, produce vibration and send noise, and armature and iron core are are very easily worn and torn; And cause the contact loose contact; The generation arc spark is bright hinders contact, reduction of service life, and noise makes people's susceptible tired.In order to eliminate the problem that armature can not tightly be sucked by iron core, producer is 1 short circuit copper ring of setting-in on the iron core column end face.This short circuit copper ring is equivalent to the secondary winding of transformer.After solenoid fed alternating current, coil current produced magnetic flux Φ 1, produced induced current I 2 in the short-circuited conducting sleeve and formation magnetic flux Φ 2, because electric current I 1 is different with the phase place of I2, so Φ 1 is also different with the phase place of Φ 2, promptly Φ 1 is not zero with Φ 2 simultaneously.Like this, at magnetic flux Φ 1 during through zero passage, Φ 2 is non-vanishing and produce suction, holds armature, and armature is sucked by iron core all the time; Core loss, short-circuited conducting sleeve loss accounting is great, though vibration and noise reduce, power consumption is bigger, vibration and noise still can not thoroughly be eliminated.
How to address the above problem, be the technical barrier of this area.
The utility model content
The technical problem that the utility model will solve provides a kind of silent power-saving formula A.C. contactor simple in structure.
In order to solve the problems of the technologies described above; The utility model provides a kind of silent power-saving formula A.C. contactor; It comprises: bridge rectifier D1 is serially connected with second resistance R 2 between the positive and negative electrode of said bridge rectifier D1, the 3rd resistance R 3, resistance strain gage R7, the 4th resistance R 4 and capacitor C 1 successively; The anode of one voltage stabilizing didoe D2 links to each other with the contact of said second resistance R 2 and the 3rd resistance R 3, and the negative electrode of voltage stabilizing didoe D2 links to each other with the negative pole of said bridge rectifier D1; The anode of one unidirectional controllable silicon S CR links to each other with the positive pole of said bridge rectifier D1; The end of sucking coil L1 in the negative electrode of this unidirectional controllable silicon S CR and the A.C. contactor links to each other, and the other end of this sucking coil L1 links to each other with the negative pole of said bridge rectifier D1; The contact of the 3rd resistance R 3 and resistance strain gage R7 links to each other with an end of one the 5th resistance R 5; The other end of the 5th resistance R 5 links to each other with first base stage of a double base diode BT; Second base stage of double base diode BT extremely links to each other with the control of said unidirectional controllable silicon S CR; The emitter of double base diode BT and the 4th resistance R 4 and capacitor C 1 contact link to each other, the control utmost point of said unidirectional controllable silicon S CR is connected in series the negative pole that meets said bridge rectifier D1 after one the 6th resistance R 6; Armature in the A.C. contactor and iron core are suitable for pushing said resistance strain gage R7 when adhesive, increase the resistance of said resistance strain gage R7 with moment.
Said double base diode BT, the 3rd resistance R 3, resistance strain gage R7, the 4th resistance R 4 and capacitor C 1 constitute forms relaxation oscillator, and the pulse signal of relaxation oscillator output is exported and is loaded into the control of controllable silicon SCR and extremely goes up on the 6th resistance R 6.
Said second resistance R 2 constitutes the all-wave voltage stabilizing circuit with voltage stabilizing didoe D2.
Above-mentioned A.C. contactor gets when electric; Relaxation oscillator starts and with higher hunting of frequency; The pulse signal of second base stage output of the double base diode BT in the relaxation oscillator is exported and is loaded into the control of controllable silicon SCR and extremely goes up on the 6th resistance R 6; And making the angle of flow of controllable silicon SCR be in maximum rating, the direct current in loop, sucking coil (L1) place also is in maximum, thereby makes the armature and the iron core moment adhesive of A.C. contactor; In said armature and iron core attracting process; Resistance moment of resistance strain gage R7 becomes big, thus moment strengthened the time constant that discharges and recharges of the RC circuit in the relaxation oscillator, reduced the charging current of capacitor C 1; Impel relaxation oscillator to reduce frequency of oscillation; And make the conducting angle of controllable silicon SCR be in minimum state, and the direct current that obtains on the sucking coil L1 is in minimum value, and this direct current that is in minimum value is suitable for making A.C. contactor to be stabilized in the sticking state.
The utility model utilizes the sudden change of resistance strain gage R7 resistance to control the power supply of the sucking coil L1 of A.C. contactor, makes it initially have bigger electric current in energising, guarantees the adhesive of contactor armature.Along with the adhesive of armature and iron core, the resistance of resistance strain gage R7 increases rapidly, and the electric current of control sucking coil L1 reduces, and is stabilized in the sticking state at last.Adopt unidirectional controllable silicon S CR to realize the switching of electric current, and utilize its switching characteristic to replace contact switch, realize that current switching also can utilize its Current Control effect simultaneously, the holding current of control sucking coil L1.
The technique scheme of the utility model is compared prior art and is had the following advantages: the advantage that the ac contactor silent electricity-saving appliance of the utility model has: 1) contactless: be employed in armature and iron core resistance strain gage when adhesive and stop the mode of sudden change to control the silicon controlled angle of flow, realized the function of the contactless automatic conversion of the big current start of ac contactor coil, little electric current adhesive.Thoroughly eliminate the disadvantage of contact switch, improved security reliability, prolonged useful life.2) energy-conservation: as to utilize the controllable current effect of power semiconductor, the low pressure holding current is provided.Further reduced circuit loss, power savings is remarkable.3) be easy to popularization, structure letter, volume is little, and cost is low.
Description of drawings
For the content that makes the utility model is more clearly understood, below basis specific embodiment and combine accompanying drawing, the utility model is done further detailed explanation, wherein
Fig. 1 is the circuit theory diagrams of the silent power-saving formula A.C. contactor among the embodiment; Second resistance R 2 is got 60K Ω; The 3rd resistance R 3 is got 100 Ω; The 4th resistance R 4 is a rheostat, gets 470K Ω; The 6th resistance R 6 is got 100 Ω; Capacitor C 1 is got 223pF.
Embodiment
See Fig. 1; The silent power-saving formula A.C. contactor of present embodiment; Comprise: bridge rectifier D1 is serially connected with second resistance R 2 between the positive and negative electrode of said bridge rectifier D1, the 3rd resistance R 3, resistance strain gage R7, the 4th resistance R 4 and capacitor C 1 successively; The anode of one voltage stabilizing didoe D2 links to each other with the contact of said second resistance R 2 and the 3rd resistance R 3, and the negative electrode of voltage stabilizing didoe D2 links to each other with the negative pole of said bridge rectifier D1; The anode of one unidirectional controllable silicon S CR links to each other with the positive pole of said bridge rectifier D1; The end of sucking coil L1 in the negative electrode of this unidirectional controllable silicon S CR and the A.C. contactor links to each other, and the other end of this sucking coil L1 links to each other with the negative pole of said bridge rectifier D1; The contact of the 3rd resistance R 3 and resistance strain gage R7 links to each other with one the 5th resistance R 5; One end of the other end of the 5th resistance R 5 links to each other with first base stage of a double base diode BT; Second base stage of double base diode BT extremely links to each other with the control of said unidirectional controllable silicon S CR; The emitter of double base diode BT and the 4th resistance R 4 and capacitor C 1 contact link to each other, the control utmost point of said unidirectional controllable silicon S CR is connected in series the negative pole that meets said bridge rectifier D1 after one the 6th resistance R 6; Armature in the A.C. contactor and iron core are suitable for pushing said resistance strain gage R7 when adhesive, increase the resistance of said resistance strain gage R7 with moment.
Said double base diode BT, the 3rd resistance R 3, resistance strain gage R7, the 4th resistance R 4 and capacitor C 1 constitute forms relaxation oscillator, and the pulse signal of relaxation oscillator output is exported and is loaded into the control of controllable silicon SCR and extremely goes up on the 6th resistance R 6.The 3rd resistance R 3, resistance strain gage R7, the 4th resistance R 4 and capacitor C 1 constitute the RC circuit.
Said second resistance R 2 constitutes the all-wave voltage stabilizing circuit with voltage stabilizing didoe D2.Be provided with overvoltage protection resistance R 1 between a pair of ac input end of bridge rectifier D1.The 4th resistance R 4 is a rheostat.
In the present embodiment, bridge rectifier D1 gets when electric, and the frequency of oscillation when relaxation oscillator starts is higher, and the angle of flow of controllable silicon SCR is in maximum, and the direct current in loop, sucking coil L1 place is in also maximum.When armature in the A.C. contactor and iron core adhesive; Resistance strain gage R7 is because of according to increasing severely the adhesive pressure resistance between armature and the iron core; RC circuit in having strengthened discharge and recharge time constant, reduced the C1 charging current, impelling its frequency of oscillation is that 1 pulse output is only arranged in 1 power frequency period; The conducting angle of controllable silicon SCR is in minimum; The direct current that obtains on the sucking coil L1 is in minimum (surveying irregular current waveform in full-wave rectifier), thereby has further reduced circuit loss, and power savings is remarkable.Realized the function of the contactless automatic conversion of the big current start of ac contactor coil, little electric current adhesive.
Obviously, the foregoing description only be for explain clearly that the utility model does for example, and be not to be qualification to the execution mode of the utility model.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all execution modes.And conspicuous variation that these spirit that belong to the utility model are extended out or change still are among the protection range of the utility model.
Claims (3)
1. silent power-saving formula A.C. contactor; It is characterized in that comprising: bridge rectifier (D1) is serially connected with second resistance (R2), the 3rd resistance (R3), resistance strain gage (R7), the 4th resistance (R4) and electric capacity (C1) between the positive and negative electrode of said bridge rectifier (D1) successively; The anode of one voltage stabilizing didoe (D2) links to each other with the contact of said second resistance (R2) with the 3rd resistance (R3), and the negative electrode of voltage stabilizing didoe (D2) links to each other with the negative pole of said bridge rectifier (D1); The anode of one one-way SCR (SCR) links to each other with the positive pole of said bridge rectifier (D1); One end of the sucking coil (L1) in the negative electrode of this one-way SCR (SCR) and the A.C. contactor links to each other, and the other end of this sucking coil (L1) links to each other with the negative pole of said bridge rectifier (D1); The contact of the 3rd resistance (R3) and resistance strain gage (R7) links to each other with an end of one the 5th resistance (R5); The other end of the 5th resistance (R5) links to each other with first base stage of a double base diode (BT); Second base stage of double base diode (BT) extremely links to each other with the control of said one-way SCR (SCR); The emitter of double base diode (BT) links to each other with the contact of the 4th resistance (R4) with electric capacity (C1), and the control utmost point of said one-way SCR (SCR) is connected in series the negative pole that meets said bridge rectifier (D1) behind one the 6th resistance (R6); Armature in the A.C. contactor and iron core are suitable for pushing said resistance strain gage (R7) when adhesive, increase the resistance of said resistance strain gage (R7) with moment.
2. silent power-saving formula A.C. contactor according to claim 1 is characterized in that: said double base diode (BT), the 3rd resistance (R3), resistance strain gage (R7), the 4th resistance (R4) and electric capacity (C1) constitute forms relaxation oscillator.
3. silent power-saving formula A.C. contactor according to claim 1 and 2 is characterized in that: said second resistance (R2) and voltage stabilizing didoe (D2) constitute the all-wave voltage stabilizing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120352258XU CN202285219U (en) | 2011-09-20 | 2011-09-20 | Soundless electricity-saving type alternating-current contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120352258XU CN202285219U (en) | 2011-09-20 | 2011-09-20 | Soundless electricity-saving type alternating-current contactor |
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| Publication Number | Publication Date |
|---|---|
| CN202285219U true CN202285219U (en) | 2012-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120352258XU Expired - Lifetime CN202285219U (en) | 2011-09-20 | 2011-09-20 | Soundless electricity-saving type alternating-current contactor |
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| Country | Link |
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| CN (1) | CN202285219U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426985A (en) * | 2011-09-20 | 2012-04-25 | 人民电器集团有限公司 | Silent electricity-saving type alternating current contactor |
-
2011
- 2011-09-20 CN CN201120352258XU patent/CN202285219U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426985A (en) * | 2011-09-20 | 2012-04-25 | 人民电器集团有限公司 | Silent electricity-saving type alternating current contactor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG PEOPLE ELECTRICAL APPLIANCE CO., LTD. Free format text: FORMER OWNER: PEOPLE ELECTRICAL APPLIANCES GROUP CO., LTD. Effective date: 20140603 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140603 Address after: 325604, Yueqing, Zhejiang province Liushi town wide industrial zone Patentee after: Zhejiang People Electrical Appliance Co., Ltd. Address before: 325604 Liushi people's Industrial Park, Zhejiang, Yueqing Patentee before: People Electrical Appliances Group Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120627 |